Convert Baryes to Millimeters of Mercury (Ba to mmHg)

Formula

mmHg = Ba × 0.0007500615758457

or mmHg = Ba ÷ 1333.22387415

Derivation from SI units:

• 1 Ba = 1 dyn/cm² = 10⁻⁵ N ÷ 10⁻⁴ m² = 0.1 Pa
• 1 mmHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.001 m = 133.322387415 Pa
• 1 Ba = 0.1 Pa ÷ 133.322387415 Pa per mmHg = 0.0007500615758457 mmHg

Both units are defined exactly, so the factor is exact. Barye definition: barye; Millimeter of Mercury definition: millimeter of mercury.

Worked examples

1. A reading of 100 Ba converts to 0.07500615758 mmHg.
   100 Ba × 0.0007500615758 = 0.07500615758 mmHg
2. A value of 10000 Ba is 7.500615758 mmHg.
   10000 Ba × 0.0007500615758 = 7.500615758 mmHg

Where it's used

Baryes are used for older physics and acoustics literature, while millimeters of mercury appear in blood pressure (e.g. 120/80 mmHg). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.

Barye to other pressure units

Frequently asked questions

Sources

• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "dyne per square centimeter (dyn/cm²)".
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "millimeter of mercury, conventional (mmHg)".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.